Veterinary

APIs for animal compounding.

Carprofen, pimobendan, maropitant, trilostane, ponazuril and more, with use restrictions marked on each line.

Price-check one item Request the supplier file

Sealed white drums and cartons on stainless steel racking in a clean GMP storage room

How animal compounding is governed

Animal compounding from bulk is governed by FDA's animal-drug compounding guidance, not by section 503B. GFI #256 covers veterinarians and state-licensed pharmacies; draft GFI #256B (Aug 2026) covers outsourcing and other FDA-registered facilities. Items marked "Not for food-producing animals" are prohibited for extralabel use in food animals (21 CFR 530.41).

What we list (32)

503B Category 1 FDA interim policy, conditions applyCategory 2 FDA safety risk, outside the interim policyBiologic not eligible for 503A/503B compoundingWithdrawn list not for human compoundingNo 503B pathway not on the bulks list, the shortage list or in Category 1503A HHS draft policy formVeterinary animal compounding

Status as of Nov 14, 2026. Sources: FDA 503B categories list (updated Mar 21, 2025), FDA Category 2 page (current Apr 22, 2026), 21 CFR 216.24, 21 CFR 530.41, 21 CFR 600.3(h)(6), HHS FR 2026-22192. No item we list is on the 503B bulks list today. Shortage status is checked when we price your request. Labels are a starting point, not a determination for your facility.

Chloramphenicol Palmitate 503B Category 1 Not for food-producing animals VeterinaryPrice this item
503B Category 1 except oral use. Oral human products are on FDA's withdrawn list.
Potassium Bromide 503B Category 1 VeterinaryPrice this item
Altrenogest No 503B pathway VeterinaryPrice this item
Atipamezole Hydrochloride No 503B pathway VeterinaryPrice this item
Azaperone No 503B pathway VeterinaryPrice this item
Benazepril Hydrochloride No 503B pathway VeterinaryPrice this item
Butaphosphan No 503B pathway VeterinaryPrice this item
Carprofen No 503B pathway VeterinaryPrice this item
Clenbuterol Hydrochloride No 503B pathway Not for food-producing animals VeterinaryPrice this item
Not approved for human use in the US.
Decoquinate No 503B pathway VeterinaryPrice this item
Demecarium Bromide No 503B pathway VeterinaryPrice this item
Deslorelin Acetate No 503B pathway VeterinaryPrice this item
Detomidine Hydrochloride No 503B pathway VeterinaryPrice this item
Diclazuril No 503B pathway VeterinaryPrice this item
Enrofloxacin No 503B pathway VeterinaryPrice this item
Firocoxib No 503B pathway VeterinaryPrice this item
Isoflupredone Acetate No 503B pathway VeterinaryPrice this item
Levamisole Hydrochloride No 503B pathway VeterinaryPrice this item
Marbofloxacin No 503B pathway VeterinaryPrice this item
Maropitant Citrate No 503B pathway VeterinaryPrice this item
Medetomidine Hydrochloride No 503B pathway VeterinaryPrice this item
Metronidazole Benzoate No 503B pathway Not for food-producing animals VeterinaryPrice this item
Pimobendan No 503B pathway VeterinaryPrice this item
503B Category 3 (nominated without adequate support).
Ponazuril No 503B pathway VeterinaryPrice this item
Praziquantel No 503B pathway VeterinaryPrice this item
Pyrantel Pamoate No 503B pathway VeterinaryPrice this item
503B Category 3 (nominated without adequate support).
Romifidine Hydrochloride No 503B pathway VeterinaryPrice this item
Ronidazole No 503B pathway Not for food-producing animals VeterinaryPrice this item
Toceranib Phosphate No 503B pathway VeterinaryPrice this item
Toltrazuril No 503B pathway VeterinaryPrice this item
503B Category 3 (nominated without adequate support).
Trilostane No 503B pathway VeterinaryPrice this item
503B Category 3 (nominated without adequate support).
Tylosin Tartrate No 503B pathway VeterinaryPrice this item

Questions

Do the 503B labels apply to animal drugs?

No. Section 503B is a human-drug section. Lines on this page are labeled Veterinary, with any food-animal restriction noted.

Which items are restricted in food animals?

Items marked "Not for food-producing animals," including chloramphenicol, clenbuterol, ronidazole and metronidazole.

Can I start with one item?

Yes. Use the price-check form.

Every quote includes

A written price and pack size per item, the lot COA, and each item's FDA status as of the date we price it. Nothing ships until you approve the price sheet.

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